Outside party activities for 14-year-olds?

I'm having my 14th birthday party outside on my lawn. There will be about 30 people (boys and girls). I'll have sports like basketball, football, and soccer, and there will also be music and food. Later we'll play man-hunt and maybe have a bonfire. I don't want any of the non-sporty people to be bored, so does anyone have other activity suggestions?